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Can a robot make a new knee feel like your own?

NCT ID NCT06389435

NEW Symptom relief Sponsor: Danderyd Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 21, 2026 · Last updated Sep 21, 2026

Summary

The ROCKETS trial compares robot-assisted total knee replacement with conventional total knee replacement in adults with knee osteoarthritis. Researchers randomly assign up to 1,600 participants to one of the two surgical approaches and follow them for two years. The main question is how many people in each group score 80 or higher on a scale that measures whether they forget about their replaced knee during everyday activities. The trial also tracks pain, function, quality of life, complications, and costs.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Robot-assisted total knee replacement surgery compared with conventional total knee replacement surgery
What this could lead to
If robot-assisted surgery helps more people stop noticing their new knee, hospitals could adopt it more widely and patients might regain a more natural feel during daily activities.
What could go wrong
Robotic systems are costly and add operating time, and any advantage over standard surgery may be small or fade over years. Results from this trial may not apply to all surgeons or hospitals.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 1,600 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2024

Expected to finish

Dec 2037

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18 years and older. * Eligible for total knee arthroplasty according to local guidelines and routines. * Willingness to participate in the study. Exclusion Criteria: * Patients with extreme malalignment necessitating special implants or techniques. * Patients unfit for surgery due to other medical reasons. * Patients who, for other reasons such as alcohol or substance abuse, are deemed unsuitable to participate in the study. * Patients who, for other reasons, cannot fulfil the required patient-reported outcome measures.

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Knee arthroplasty, total Osteoarthritis of the knee Robotic-assisted

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Danderyd Hospital

    RECRUITING

    Stockholm, 182 88, Sweden

  • Hässleholm Hospital

    RECRUITING

    Hässleholm, 281 38, Sweden

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